GPT 5 Nano
AffordableUltra-fast and lightweight GPT-5 variant for low-latency tasks.
Smallest model in the GPT-5 family — optimized for speed and cost with a 1M-token context window.
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GPT 5 Nano by OpenAI has a Capability Index of 73.4, making it comparable to the field average. It ranks #48 out of 92 models on the idapt capability leaderboard. GPT 5 Nano is somewhat expensive at $0.05/M tokens input and $0.40/M tokens output. Cached input reads are priced at $0.005/M tokens, making repeated context cheaper. The model supports vision/image input, extended reasoning, a 400K context window.
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Mistral Small 4vs GPT 5 NanoFrequently Asked Questions about GPT 5 Nano▼
When was GPT 5 Nano released?
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GPT 5 Nano was released on August 7, 2025.
Who created GPT 5 Nano?
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GPT 5 Nano was created by OpenAI.
How capable is GPT 5 Nano?
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GPT 5 Nano has a Capability Index of 73.4/100, making it comparable to the field average. It ranks #48 out of 92 models.
How much does GPT 5 Nano cost?
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GPT 5 Nano costs $0.05/M input tokens and $0.40/M output tokens.
What is GPT 5 Nano API pricing?
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The GPT 5 Nano API is priced at $0.05 per million input tokens and $0.40 per million output tokens. You can access GPT 5 Nano through idapt.app alongside 200+ other AI models in one workspace.
Is GPT 5 Nano a reasoning model?
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Yes, GPT 5 Nano is a reasoning model. It can think step-by-step through complex problems before providing an answer, often yielding better results on difficult tasks like math, coding, and multi-step logic.
Does GPT 5 Nano support image or vision input?
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Yes, GPT 5 Nano supports vision/image input. You can share images in your conversation and the model will analyze and respond based on their content.
Does GPT 5 Nano support audio?
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No, GPT 5 Nano does not support audio input.
What is the context window of GPT 5 Nano?
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GPT 5 Nano has a context window of 400K tokens, meaning it can process approximately 300,000 words of context at once.
Is GPT 5 Nano open source?
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GPT 5 Nano is a proprietary model developed by OpenAI. The model weights and training data are not publicly available.
What is GPT 5 Nano good at?
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Based on benchmark data, GPT 5 Nano excels at: mathematical problem solving, visual analysis and image understanding. It is OpenAI's capable model suitable for a wide range of tasks.
Where can I use GPT 5 Nano?
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You can chat with GPT 5 Nano on idapt.app — no separate API key required. idapt is an AI workspace with 200+ models, agents, computers, and tasks. You can also access GPT 5 Nano through OpenAI's own API or platform.